JPH027893Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field of the invention The invention relates to a tuck-in device for a piece loom,
In particular, it relates to a means for stopping the tuck-in operation during horizontal stop.

PRIOR ART Normally, when a loom stops due to a weft insertion defect, the loom cannot stop suddenly due to the inertia of its rotating parts, so it will stop at the next weaving cycle in which the weft insertion defect occurred.

By the way, in the conventional tuck-in device, as shown in FIG. 1, one end of the weft yarn 1 that is poorly inserted, such as a shot pick, is stopped in a state where it is tucked in between the warp yarns 2, like the other weft yarns 1. do. Therefore, as a flaw recovery operation, it is necessary to pull out the next weft thread 1 after the weft thread 1 with poor weft insertion, and at the same time, take out the tucked-in yarn end of the weft thread 1 with poor weft insertion from inside the opening 3 of the warp threads 2. Thereafter, the opening 3 must be moved back by one weaving cycle and the weft yarn 1 that has been poorly inserted must be pulled out. However, the task of taking out the yarn end of the weft yarn 1 that has already been tucked in in this way from inside the opening 3 is very complicated, and is particularly difficult when the weft yarn 1 is thin.

Purpose of the invention Therefore, the purpose of the present invention is to prevent the thread end of the weft thread from being tucked in when a weft insertion defect occurs, omit the above-mentioned troublesome work, and facilitate the flaw recovery operation. It is to be.

Summary of the invention In the present invention, as shown in FIG.
and the weft thread 1 of the next weaving cycle is ready for easy withdrawal. The purpose of the above is to retract the part of the weft thread 1 with poor weft insertion that can be hooked by the tuck-in needle to a position where it cannot be hooked, and thereby cause the end of the weft thread 1 with the defect to be caught by the tuck-in needle. This can be solved by preventing it from being drawn into the opening 3. The present invention provides a displacement member between the weave end of the woven fabric and the gripper as a means for retracting the weft yarn 1 that is defective in weft insertion, and moves this displacement member to the retraction position by a drive means when a weft stop signal is input. I'm trying to move it. The above-mentioned displacement member is composed of a gripper and another member, but in a preferred embodiment of the present invention, the gripper also serves as the displacement member. This simplifies the mechanical structure.

Configuration of the invention Hereinafter, the configuration of the invention will be specifically explained based on FIG. 3.

As already mentioned, the weft threads 1 are inserted into the openings 3 formed by the warp threads 2, and the warp threads 2
The woven fabric 4 is interwoven with the woven fabric 4.

The end of the weft yarn 1 is then woven and bent into the opening 3 by the tuck-in device 5 of the present invention. This tuck-in device 5 includes, as main parts, a gripper 6 that also serves as a displacement member 13, a tuck-in needle 7, and a drive means 8. The gripper 6 is for frictionally holding the end of the weft thread 1, and is fixed to one end of the lever 9. This lever 9 is swingably supported by a shaft 10 in a fixed position, and is connected to a drive rod 12 of the drive means 8 by a pin 11 at the other end so as to be able to move to some extent. Note that this driving means 8 is, for example, a solenoid or the like, and is attached to a frame of a loom or the like.
Further, as in the conventional example, the gripper 6 enters the inside of the opening 3, projects the hooked portion 7a at the tip to the edge of the cloth, and guides the end of the weft yarn 1 immediately after wefting into the inside of the opening 3. Make a reciprocating motion that draws you in.

As already mentioned, the weft threads 1 are successively introduced into the openings 3 of the warp threads 2. Immediately after wefting, the end of the weft thread 1 is frictionally held between the grippers 6. In the next weaving cycle, the tuck-in needle 7 hooks the weft thread 1 between the fabric 4 and the gripper 6 with its hook 7a and draws it into the opening 3. In this way, the ends of the weft threads 1 are successively drawn into the openings 3 of the next weaving cycle.

Now, when a weft insertion failure occurs during such weaving, the drive means 8 uses the weft stop signal S as an input condition to project the drive rod 12 in the direction of the arrow and to reverse the lever 9 about the shaft 10. Rotate clockwise. With this, the gripper 6
While holding the end of the weft thread 1 with poor weft insertion,
The end of the weft thread 1 is moved to a retracted position, that is, a position where it cannot be caught by the hook 7a of the tuck-in needle 7. As a result, in the next weaving cycle, the hook 7a of the tuck-in needle 7 tries to pull the weft thread 1 with poor weft insertion into the opening 3, but since the end of the weft thread 1 does not exist at the predetermined position, You will not be able to perform the action. Therefore, the weft yarn 1 that is poorly inserted is not drawn into the opening 3 and is in a state where it can be easily pulled out.

It should be noted that the gripper 6 can also be provided directly at the end of the drive rod 12 of the drive means 8 without using the level 9.

Modified Example of the Invention In the above embodiment, the gripper 6 also serves as the displacement member 13 for displacing the end of the weft thread 1 to the retracted position. It can also be provided separately from the gripper 6. In this case, the gripper 6 is fixedly provided on an extension of the opening 3 and is separated from the gripper 6 by a separate displacement member 13.
is provided between the woven end of the woven fabric 4 and the gripper 6 in a state that it can be displaced to a retracted position, and is provided so as to be directly driven by the driving means 8.

Effects of the invention In this invention, when there is a weft insertion defect, the gripper that also serves as a displacement member or a separate displacement member moves the end of the weft yarn with the defective weft insertion to the retracted position. No action is required, and therefore no troublesome operations are required during the wound repair operation, and the work can be done more efficiently.

Further, in the embodiment in which the gripper also serves as the displacement member, the displacement member is not particularly required, and the structure of that portion can be simplified accordingly.

[Brief explanation of drawings]

Fig. 1 is a plan view of the tuck-in part when it is stopped due to a weft insertion failure, Fig. 2 is a plan view of the tuck-in part according to the present invention when it is stopped due to a weft insertion failure, and Fig. 3 is a plan view of the tuck-in device of the present invention. FIG. 4 is a perspective view of the same device in another embodiment. 1...Weft, 2...Warp, 3...Opening, 4
... woven fabric, 5 ... tuck-in device, 6 ... gripper, 7 ... tuck-in needle, 8 ... drive means, 9 ... lever, 10 ... shaft, 11 ... pin,
12... Drive rod, 13... Displacement member.

Claims (1)

[Claims for Utility Model Registration] (1) A gripper that frictionally holds the end of the weft thread that has been inserted, and a gripper that enters between the edge of the woven fabric and the gripper and holds the end of the weft thread that has been inserted. A tuck-in needle that is hooked and pulled into the opening of the next weaving cycle, a displacement member that retracts the weft from the hooked position, and a drive means that moves the displacement member to the retracted position using a weft stop signal as an input condition. A tatsu-in device comprising: (2) The tuck-in device according to claim 1, wherein the gripper is freely displaceable, and the gripper also serves as the displacement member.